Julius gustav schmidt



No. 607,284. Patented July I2, I898. I. G. SCHMIDT.

WATER TUBE BOILER. (Application filed Nov. 10, 1897.) (No Model.) 2Sheets-Sheet I.

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No. 607,284. I Patented July 12, I890 1. a. SCHMIDT.

WATER TUBE BOILER.

(Application filed Nov. 10, 1897.) (No Model.) 2 Sheets-Sheet 2.

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UNITED STATES JULIUS GUSTAV SCHMIDT,

OF ERKNER, GERMANY.

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 607,284, dated July 12,1898.

Application filed November 10, 1897. Serial No. 658,025. (No model.)

To all whom it may concern;

Be it known that I,JULIUs GUsTAv SCHMIDT, manufacturer, of Erkner, intheEmpire of Germany, have invented certain new and useful Improvements inlVater-Tube Boilers, of which the following is a true specification.

The present invention relates to a watertube boiler the tube system ofwhich consists of two groups of tubes, of which the one is composed ofsingle tubes standing vertically close to one another and which can beconnected in various ways with the second group of tubes, which consistsof single tubes placed horizontally, so that quite different methods ofworking the boiler can be thereby attained, according to the specialpurposes in view.

Referring to the accompanying drawings, which illustrate onemodification of 7 this boiler, Figure l is a front view of the boiler.Fig. 2 is a side view. Fig. 3 is a View from behind. Fig. 4 is a sectionon the line I I of Fig. 2. Fig. 5 is a section on the line II II of Fig.2.

The entrance of the water into the boiler is effected through theprojection A, Figs. 2 and 3, on the tube B. From this point the waterfalls down ward and fills the tubes C,arranged symmetrically on bothsides of the boiler and To each of the said tubes 0 there connects alongthe whole length directly a series of tube-heads D. Into each of thesetube-heads are inserted several water-tubes E, (in the drawings threetubes are shown,) which tubes are brazed or in any other suitable mannerfirmly connected therewith. The water will consequently distributeitself symmetrically throughout the two verticaltube groups E and mustrise up in these tubes under the influence of the heating by thecombustion-gases. Atthe uppertube ends are placed similar tube-headsF-and firmly connected thereto and arranged in a series close to oneanother in the like manner as in the case of the tube-heads D. Moreover,the tube-heads F connect immediately to a common collecting-pipe G, sothat the mixture of water and steam discharges into this pipe G in orderto pass from it through the connection E into the common steam-collectorJ. Moreover, the feed-water passes at the same time into thecollecting-tube L, which is also attached to B, and is here in and thiseven with the consequence of the heating driven upward and musttherefore pass through the four connecting-tubes K into thesteam-collector J. While the evolved steam here becomes free from thewater and collects above, the

water sinks through the tube B downward,

mixes there with the freshly-supplied feedwater,passes,through theconnections already described, again into the heated tubes E, andproceeds on its circuit over again.

The above-described tubular system consequentl y constitutes acirculating water-tube boiler. In order to render this arrangementspecially applicable for diiferent methods of working, the twohorizontally-placed groups of tubes M M are added, which are connectedwith it according as the work may require. By way of explanation in whatmanner the circulating water-tube system may be caused, through alteredconnections with the tube groups M M, to produceother methods ofoperating the boiler, suited for various requirements, the followingdescription will show:

Example 1: The boileris intended for motor purposes to work at a veryhigh pressure and with multiple expansion. In this case the steamliberated at J passes to the first must in this manner become, throughthe action of the fire, superheated to dryness and finally escape at Nin order to serve for the driving of the motor. This method of operatingthe boiler is especially designed to obtain a very high percentage ofefficiency upon the heat-u nits contained in the fuel consumed, simplestexpansion mechanism. I

Example 2: The boiler is intended to supply saturated steamcorresponding to a given pressure without superheatin'g. In this caseand in opposition to the process employed in the first example thefeed-water is first passed through the tubes M M in such manner, for

instance, that the said water enters at the placed above and passes onthrough a connecting-piece attached to Q into the dischargepipe B, whereit takes part in the circulation already described and is completelyevaporated. The steam which may have developed already in the group oftubes M M can pass directly into the collector J through the otherconnectingpieces attached to Q. In this method of constructing theboiler the collecting-tube J can be constructed as much larger as may berequisite to fulfil the special requirements.

Example 3: The boiler is intended to be applied to both the methods ofworking set forth in examples 1 and 2. In this case the steam liberatedin J is treated in the manner described under example 1 and conducted tothe motor through one of the groups of tubes M, while the feed-water ispassed through the other group of tubes M in the manner described inexample 2. The connecting-tube Q is not required, because theconnections are made direct to each group of tubes. The above-describedboiler is therefore reversible according to the special destination ofthe steam to be raised in it, inasmuch as the one group of tubes mayserve either as a superheater or as a preliminary heater. Bycorrespondiugly-arranged connections the same boiler can therefore beapplied to the different purposes with especial advantages.

Vith regard to the illustrations of the horizontally-placed boilersystem M M it should be stated that in Fig. 1 the same tube-heads areillustrated, Whereas in Fig. 3 the connecting-pieces P are representedas placed upon the several tube-heads. The feet R of the boiler arehollow and are in immediate connection with the circulation-space of thewater, so that the said feet serve as mud-collectors, and the contentsof the boiler can be blown out through them by means of theconnecting-pieces S. The fire-space is so arranged in the middle of theboiler system (shown in the drawings) that the water-tubes in respect tothe same lie symmetrically at both sides thereof, and that inconsequence of the special arrangement of the tubes the lire-gases canrise equally on both sides, and thus heat all the tubes almost equally,thereby securing a very high efliciency. The firegases may be taken awayin this boiler system either from above or sidewise, or even sidewiseand downward, according as the cover is arranged; also, several boilersmay be combined together with a single cover, especially when economy ofspace is of considerationas, for instance, in ships.

I claim-- 1. A water-tube boiler, consisting of an upright tube B,provided with an inlet, trans verse tubes 0 connected with tube B belowthe inlet, two groups of upright tubes E E arranged one at each side ofa central space and connected with the tubes C, horizontalcollecting-tubes G above and connected with the respective groups E, E,a common steamcollector J arranged horizontally and centrally above andconnected with said collecting tubes G, said collector J being at oneend connected with the upright tube B, and a collecting-tube L betweenthe two groups of tubes E, E, arranged below the steam-collector J andconnected at one end with the upright tube B, substantially as setforth.

2. A water-tube boiler, consisting of an upright tube 13 provided withan inlet, transverse tubes 0 connected with tube B below the inlet, twogroups of upright tubes E, E,

1 arranged one at each side of a central space and connected with thetubes 0, horizontal collecting-tubes G arranged above and connected withthe respective groups E, E, a common steam-collector J arrangedhorizontally and centrally above and connected with saidcollecting-tubes G, said collector J being at one end connected with.the upright tube 13, and a series of horizontal tubes M connected inserpentine form and arranged at each side of said groups of tubes E, E,and being connected with the common steam-collector J, substantially asset forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

JULIUS GUSTAV SCHMIDT.

Witnesses:

HENRY HASPER, W. HAUPT.

